The invention provides a device for cleaning away pipeline sediments. The device comprises a driving cylinder with an opening in one end and a cutting cylinder with an opening in one end. The opened end of the driving cylinder body connected with the un-opened end of the cutting cylinder. The driving cylinder is used for being connected with a driving device, and a cutting part is arranged on theedge of the opening of the cutting cylinder. A power supply part and a clamping part are arranged in the driving cylinder, and the power supply part is connected with the clamping part. A first conductive part is arranged on the outer wall of the un-opened end of the cutting cylinder, and a second conductive part is arranged in the side wall of the cutting cylinder. A heating part is arranged in the side wall, close to the cutting part, of the cutting cylinder. The first conductive part, the second conductive part and the heating part are connected in sequence. According to the device for cleaning away the pipeline sediments, a cutting edge of the cutting part cannot be stuck by the sediments, the time and labor are saved in the cleaning process, and the efficiency is high.